"We're a very close family," he told E! News exclusively on Wednesday, Oct. 9. "Nothing changes."

The 26-year-old entrepreneur didn't intrude on his mom and stepdad's decision to live apart. "Honestly, that conversation—I leave between my mom and Bruce, just because it's not my business," he said. "They're not like sitting down with each of us and saying, 'This is what's going on.'"

Bruce and Kris have two daughters together—Kylie and Kendall Jenner—and each have four children from previous marriages. As we all know, Bruce has very much taken on the father figure role for Rob, Khloé, Kourtney and Kim Kardashian since their biological father passed away in 2003. And while Kris' relationship with the Olympic decathlete is changing, Rob knows Bruce's role in his life won't be affected.

"Bruce doesn't leave my side ever," he said. "We golf every day, we race cars, we hang out with all the guys—he's my dad. He's been in my life since I was 2 years old, and he's going to be in my mom's life."